19494090 has 192 divisors, whose sum is σ = 66044160. Its totient is φ = 3870720.

The previous prime is 19494073. The next prime is 19494103. The reversal of 19494090 is 9049491.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 200922 + ... + 201018.

It is an arithmetic number, because the mean of its divisors is an integer number (343980).

Almost surely, 2^19494090 is an apocalyptic number.

19494090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19494090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

19494090 is an abundant number, since it is smaller than the sum of its proper divisors (46550070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19494090 is a wasteful number, since it uses less digits than its factorization.

19494090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19494090 is about 4415.2112067261. The cubic root of 19494090 is about 269.1334357316.

The spelling of 19494090 in words is "nineteen million, four hundred ninety-four thousand, ninety".